Don't ride a bicycle ____the playground_____school.A on.on B in.at C at...in选什么,为什么

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Don''trideabicycle____theplayground_____school.Aon.onBin.atCat...in选什么,为什么Don''trideabicycle____thepla

Don't ride a bicycle ____the playground_____school.A on.on B in.at C at...in选什么,为什么
Don't ride a bicycle ____the playground_____school.A on.on B in.at C at...in选什么,为什么

Don't ride a bicycle ____the playground_____school.A on.on B in.at C at...in选什么,为什么
B 理由:in the playground 是特定词组;at school 表示在学校里的时间或做的事情 不表示一个地点,所以选in.

on at
on the playground 在操场上
at school 在学校;

on , in